2006-11-21 19:33:30 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
In chemistry, an alkali is a basic, ionic salt of an alkali metal or alkali earth metal element.
Alkalis are best known for being bases (compounds with pH greater than 7) that dissolve in water.
All alkalis have a pH greater than seven and hence can be detected with litmus paper (litmus will turn blue on contact with an alkali).
Most alkalis have a pH of 10 or greater. This means that they will turn phenolphthalein from colorless to pink.
Caustic (causing chemical burns).
Alkaline solutions are slippery or soapy to the touch (due to the caustic reaction dissolving the surface of the skin and fingerprint).
Alkalis normally form aqueous solutions (although some like barium carbonate are only soluble when reacting with an acidic aqueous solution).
2006-11-21 19:36:49 · answer #1 · answered by sugar candy 6 · 0⤊ 1⤋
What Is An Alkali
2016-09-30 00:57:34 · answer #2 · answered by ? 4 · 0⤊ 0⤋
Alkali - Any compound having marked basic properties
Base - A compound of a metal or a metal-like group, with hydrogen and oxygen in the proportion to form an OH radical, which ionizes in aqueous solution to yield hydroxyl ions. A base is formed when a metallic oxide reacts with water.
2006-11-21 22:36:22 · answer #3 · answered by Rodolfo Max 4 · 1⤊ 0⤋
Alkalis react with acids to form a salt and water. (aka neutralisation)
2006-11-21 19:43:43 · answer #4 · answered by iiby 1 · 0⤊ 0⤋
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what is an alkali?
2015-08-08 08:44:24 · answer #5 · answered by Anonymous · 0⤊ 0⤋